Abstract: An apparatus including an electrical device electrically coupled to a power source and transient suppression and current control circuitry electrically coupled to the electrical device. The circuitry includes a negative temperature coefficient thermistor electrically coupled between the power source and the electrical device and being responsive to an electrical power surge condition to dissipate at least a portion of the power associated with the surge. The circuitry also includes a positive temperature coefficient thermistor electrically coupled between the power source and the electrical device and being responsive to a change in electrical current to maintain the electrical current below an acceptable threshold level.

Abstract: An apparatus including an electrical device electrically coupled to a power source and transient suppression and current control circuitry electrically coupled to the electrical device. The circuitry includes a negative temperature coefficient thermistor electrically coupled between the power source and the electrical device and being responsive to an electrical power surge condition to dissipate at least a portion of the power associated with the surge. The circuitry also includes a positive temperature coefficient thermistor electrically coupled between the power source and the electrical device and being responsive to a change in electrical current to maintain the electrical current below an acceptable threshold level.

Abstract: The present invention includes a system with a sensor to detect a change in one or more physical characteristics and provide a corresponding electrical sensor signal, a controller including a power source for the sensor, and transient suppression circuitry. This circuitry is coupled between the sensor and the power source of the controller, and includes a first thermistor to protect the sensor from a power surge from the controller and/or power source.